Prob.norm-methods | R Documentation |
Method to compute the transition probability matrix of network. A network matrix is normalized by dividing each entry W_{ij} by the the sum of elements of row i In other words if D is a diagonal matrix such that D_{ii} = ∑_j W_{ij} then the normalize matrix is:
W_{norm} = D^{-1} W
Prob.norm(W)
W |
an object representing the graph to be normalized |
The normalized transition probability matrix of network
signature(W = "graph")
an object of the virtual class graph (hence including objects of class graphAM
and graphNEL
from the package graph)
signature(W = "matrix")
a matrix representing the adjacency matrix of the graph
library(bionetdata); # making transition prob matrix for a drug-drug similarity network data(DD.chem.data); W <- Prob.norm(DD.chem.data); # the same using an object of class graphAM and of class graphNEL g <- new("graphAM", adjMat=DD.chem.data, values=list(weight=DD.chem.data)); Wg <- Prob.norm(g); g2 <- as(g, "graphNEL"); Wg2 <- Prob.norm(g2);
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